Henrys Law and Cavitation

Henry's Law and cavitationEver wondered why a perfectly ...

What do you want from your BMS 2/3

Before I answer the question, let’s look at the diagra...

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

Wet bulb depression efficiency-evaporati...

For those who have been to Malaysia, the first thing you eve...

Gas Detectors-Ammonia Refrigerant

Cooling Tower Sizing Calculator

Use this cooling tower sizing calculator helps estimate prel...

UN SDGs, good intentions, wrong priority...

The United Nations Sustainable Development Goals (UN SDGs), ...

Air Purifiers, Hepa Filters, or Air Filt...

AS 1668.2 bathroom and toilet exhaust ve...

Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

Calculate Pump Motor Power

Use this pump motor power calculator to estimate the power r...

High Latent Load Dehumidification Reheat...

Use this calculator to check high latent load cooling and de...

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

Maisotsenko Cycle

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

Refrigeration Cycle P-H Diagram Calculat...

Use this free HVAC Refrigeration P-H Diagram Calculator to b...

Duct Heat Gain and R-Value Insulation Ca...

Use this calculator to estimate duct heat gain as a percenta...

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

Stair pressurisation system

Stair pressurisation systemDoor average area: 2.1m2Design nu...

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

What do you want from your BMS 2/3

Before I answer the question, let’s look at the diagra...

ERV energy recovery calculator

Use this HVAC air-to-air heat exchanger and ERV calculator t...

Properties of air-psychrometry

Air is the medium with which buildings are cooled and heated...

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

What do you want from your BMS 3/3

What do you want from your BMS. Part 3: Direct Expansion Eva...

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

Calculate Pump Motor Power

Use this pump motor power calculator to estimate the power r...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

Plate Heat Exchanger Sizing Calculator

Use this liquid plate heat exchanger sizing calculator to es...

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

The Role of the Compressor

Think back to the hot heat exchanger and the black grille be...

Condensate Tray Pondage Is an Installati...

Condensate trays must be graded to drain continuously and pr...

AS1668.2 Exhaust Air Requirements

AS1668.2 Exhaust Air RequirementsEnclosure typeQuantityUnitC...

The Evaporation of R22

Let’s take a cylinder of R22 at an ambient temperature...

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

Evaporative Condenser Access and Mainten...

Providing safety access platforms for evaporative condensers...

AS 1668.2 Kitchen Exhaust Calculator

Use this AS 1668.2 kitchen exhaust calculator to estimate mi...

Cooling Tower Sizing Calculator

Use this cooling tower sizing calculator helps estimate prel...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

HVAC calculators and Estimators

Free HVAC calculators and estimators for cooling, heating, a...

ASNZS 5149 Refrigerant Charge Limit Calc...

Use this AS/NZS 5149 refrigerant charge limit calculator to ...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

Fabric Duct Sizing Calculator

Use this fabric duct calculator to estimate the duct size of...

Geospatial 3D Point Cloud Laser Scanning

Geospatial 3D point cloud laser scanning is a method of capt...

How to size buffer tank

Buffer tank sizing is not an arbitrary exercise. Typical gui...

Chiller System Designs Checklist

Before finalising the chiller selection, review the followin...

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

NCC2025 Part J6D9 Pipework insulation

Updated to NCC 2025(1) Piping, vessels, heat exchangers and ...

Low dT, pump control and why DP reset ma...

Low ΔT in a chilled water system is often misunderstoo...

How a chiller controls its capacity and ...

A chiller controls its capacity mainly by maintaining the le...

Laboratory Airflow Control Devices Air V...

What is Condenser in Air Conditioning Sy...

The air-cooled condenser is a heat exchanger. What is the fu...

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

Emergency Warning and Intercommunication...

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

What is P, PI & PID controls

  An open loop system operates without feedback, i...

What do you want from your BMS 3/3

What do you want from your BMS. Part 3: Direct Expansion Eva...

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

Maisotsenko Cycle

Plate Heat Exchanger Sizing Calculator

Use this liquid plate heat exchanger sizing calculator to es...

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

HVAC Duct Sizing Calculator

Use this calculator to calculate HVAC duct sizes using equal...

Duct Heat Gain and R-Value Insulation Ca...

Use this calculator to estimate duct heat gain as a percenta...

UN SDGs, good intentions, wrong priority...

The United Nations Sustainable Development Goals (UN SDGs), ...

Passive House (Haus) Designs, Heat Recov...

The rise of Passive House design has fundamentally reshaped ...

The Evaporation of R22

Let’s take a cylinder of R22 at an ambient temperature...

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

Heat energy and change of phase

Heat energy and change of phaseComfort air conditioning syst...

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

How Does Refrigerant Work in Refrigerati...

Here are some typical operating conditions. As pressures dif...

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

Constant Airflow Regulator

Understanding the Psychrometric Chart

Although engineers and technicians need to know how the valu...

Indoor pool and wellness centre

Use this indoor pool and wellness centre calculator to estim...

Chiller Sizing Calculator

Use this chiller sizing calculator to estimate key HVAC chil...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

Dehumidified IEC System

TOTAL DEHUMIDIFIED IEC

Coastal Corrosion of OA Dampers and Louv...

In a coastal environment, airborne salt settles on surfaces....

The Phenomenon of Condensation

We’ve seen that to vaporise R22, that is, to change it...

Connecting a 50hz induction motor and ru...

What happens if connecting a 50hz induction motor to 60hz po...

HVAC calculators and Estimators

Free HVAC calculators and estimators for cooling, heating, a...

Indoor pool and wellness centre

Use this indoor pool and wellness centre calculator to estim...

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

Condensate Tray Pondage Is an Installati...

Condensate trays must be graded to drain continuously and pr...

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

What Happens When All AHU Dampers Are Cl...

A serious design problem occurs when all available airflow p...

Cooling Tower Sizing Calculator

Use this cooling tower sizing calculator helps estimate prel...

AS 1668.2 Mechanical Exhaust Ventilation...

Use this AS 1668.2 mechanical exhaust ventilation rate look-...

Smoke exhaust plug holing risks

Smoke exhaust design is not only about selecting a fan with ...

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

What is Condenser in Air Conditioning Sy...

The air-cooled condenser is a heat exchanger. What is the fu...

Thermal Insulation R-Value and U-Value C...

Use this calculator to calculate R-value and U-value from in...

Split System Air Conditioners Installati...

The split system air conditioner has two parts: the indoor a...

Relationship Between Pressure and Temper...

Relationship between Pressure and Temperature If you lo...

HVAC Duct Sizing Calculator

Use this calculator to calculate HVAC duct sizes using equal...

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

Heat transfer

Air conditioning is concerned with heat flow processes. Heat...

Generator Room Ventilations

Use this generator room ventilation calculator to estimate t...

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

Stair Pressurisation Calculator

This stair pressurisation calculator estimates the prelimina...

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

What is an Air Conditioner Evaporator Co...

The evaporator is a heat exchanger that operates on the same...

AS 1668.2 Kitchen Exhaust Calculator

Use this AS 1668.2 kitchen exhaust calculator to estimate mi...

Evaporative Condenser Access and Mainten...

Providing safety access platforms for evaporative condensers...

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

Is water boiling point always at 100C

Is Water Boiling Point always at 100°CThe temperature of...

Natural Ventilation Design Mistakes

Natural ventilation can reduce mechanical cooling and fan en...

Calculate Pump Motor Power

Use this pump motor power calculator to estimate the power r...

Climate challenges ...

Climate change sits at the intersection of science, politics...

Outdoor-Air Intake Location and Indoor A...

Both AS 1668.2 and AS/NZS 3666.1 recognise that bringing out...

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

Plate Heat Exchanger Sizing Calculator

Use this liquid plate heat exchanger sizing calculator to es...

Geospatial 3D Point Cloud Laser Scanning

Geospatial 3D point cloud laser scanning is a method of capt...

Natural Ventilation Designs

 https://www.monodraught.com/https://greenhome.osu.edu/...

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

What is Coanda Effect

What is coanda effect?    How does coand...

Properties of air-psychrometry

Air is the medium with which buildings are cooled and heated...

BCA Climate Zone Interactive Map

BCA Climate Zone Interactive MapUse the ACBC climate map to ...

Comparison with P, PI & PID

Personal Air Coolers

I reckon many personal air coolers are more marketing than e...

Fabric Duct Sizing Calculator

Use this fabric duct calculator to estimate the duct size of...

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

Natural Ventilation Design Mistakes

Natural ventilation can reduce mechanical cooling and fan en...

Air conditioning back to basic principle...

Air conditioning basic principlesThe basis for air condition...

Wet bulb depression efficiency-evaporati...

For those who have been to Malaysia, the first thing you eve...

What is Boiling

The first step to understanding how the air conditioning ref...

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

What do you want from your BMS 1/3

Fresh out of uni back in the days, sitting on some cement ba...

The Physiological Basis for Air Conditio...

Seasonal extremes of heat and cold are often outside the ran...

Water use by cooling towers

Use this cooling tower water use calculator to estimate the ...

Room Noise Predictor From AHU to Diffuse...

Use this room noise predictor to estimate the expected noise...

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

What is Thermal Expansion Valve (TX Valv...

All air conditioning refrigeration circuits have expansion d...

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

Air and human comfort

Space explorations to the moon, other planets, and beyond ha...

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

Why Your High Efficient Condensing Boile...

Now that you have installed the high-efficiency condensing b...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

Safety-in-designs

Safety in design is not only about whether the HVAC system w...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

AS 1668.2 Minimum Outdoor Airflow Rate C...

Use this AS 1668.2 Minimum Outdoor Airflow Rate Calculator t...

Air conditioning back to basic principle...

Air conditioning basic principlesThe basis for air condition...

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

Solar PV Air Conditioner Sizing

Use this calculator to calculate how many solar panels are r...

Constant Airflow Regulator

UN SDGs, good intentions, wrong priority...

The United Nations Sustainable Development Goals (UN SDGs), ...

How to Size a Chiller

Sizing a chiller is more than selecting a machine with the s...

Natural Ventilation FAQ

Natural ventilation can be an effective way to provide outdo...

Coastal Corrosion of OA Dampers and Louv...

In a coastal environment, airborne salt settles on surfaces....

Emergency Warning and Intercommunication...

Conflict of Air Tightness Buildings and ...

Conflict of Air Tightness Buildings and Fire SafetyModern bu...

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

Stair Pressurisation Calculator

This stair pressurisation calculator estimates the prelimina...

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

Small in Window Air Conditioner Units In...

As its name suggests, unitary window air conditioners consis...

Outdoor-Air Intake Location and Indoor A...

Both AS 1668.2 and AS/NZS 3666.1 recognise that bringing out...

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

Psychrometric calculator

Use this free HVAC Psychrometric Calculator to calculate moi...

Primary-Secondary Pumping, Flow, Mixing,...

Use this primary-secondary pumping calculator to check how f...

Relative Pressure and Absolute Pressure

Relative Pressure and Absolute PressureThe deeper divers go ...

Emergency Warning and Intercommunication...

Lesson learnt from Year 7 maths, when is...

Lesson learnt from Year 7 maths: when is 1 + 1 = 10?At first...

Chiller System Designs Checklist

Before finalising the chiller selection, review the followin...

Chiller Sizing Example

This worked example shows how to size a chiller for a commer...

Heat transfer

Air conditioning is concerned with heat flow processes. Heat...

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

Chiller Sizing FAQs

This chiller sizing FAQ answers common questions about selec...

What do you want from your BMS 2/3

Before I answer the question, let’s look at the diagra...

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

Why Every Installed Power Meter Should C...

A local power meter only shows what is happening at the exac...

Energy conservation with comfort

You may already be aware of the rising cost of energy and th...

Dehumidified IEC System

TOTAL DEHUMIDIFIED IEC

What is Boiling

The first step to understanding how the air conditioning ref...

Chiller Sizing Calculator

Use this chiller sizing calculator to estimate key HVAC chil...

Correct installation of expansion vessel

Expansion vessels are often treated as simple pipework acces...

Understanding the Psychrometric Chart

Although engineers and technicians need to know how the valu...

Stair pressurisation system

Stair pressurisation systemDoor average area: 2.1m2Design nu...

Carpark exhaust control

Maisotsenko Cycle

What is an Air Conditioner Evaporator Co...

The evaporator is a heat exchanger that operates on the same...

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

Infrared heating

When you walk into a warehouse or sports arena with high-bay...

Low dT, pump control and why DP reset ma...

Low ΔT in a chilled water system is often misunderstoo...

Calculate Pump Motor Power

Use this pump motor power calculator to estimate the power r...

What is P, PI & PID controls

  An open loop system operates without feedback, i...

Engineering innovation, is creativity th...

Engineering is often seen as a discipline of rules, standard...

Room Noise Predictor From AHU to Diffuse...

Use this room noise predictor to estimate the expected noise...

Is Water a Good Refrigerant

Let’s remind ourselves of these two basic rules:There ...

Small in Window Air Conditioner Units In...

As its name suggests, unitary window air conditioners consis...

Removing Mould and Mould Stains

Removing Mouldconcrobium.com/en-au/Walk into Bunnings or har...

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

Solar PV Air Conditioner Sizing

Use this calculator to calculate how many solar panels are r...

Generator Room Ventilations

Use this generator room ventilation calculator to estimate t...

The Physiological Basis for Air Conditio...

Seasonal extremes of heat and cold are often outside the ran...

Comparison with P, PI & PID

How to verify the percentage of outside ...

Use this outside air percentage calculator to estimate how m...

Outdoor-Air Intake Location and Indoor A...

Both AS 1668.2 and AS/NZS 3666.1 recognise that bringing out...

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

How reciprocating compressors work in ai...

The reciprocating compressors (piston compressors or recip c...

Cooling Coil Bypass Factor Calculator

Use this calculator to estimate cooling coil bypass factor u...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

How Do Air Conditioners Work

The principal role of air conditioning is to maintain a comf...

How to Size U-Trap - AS/NZS 3666.1

Why is u-trap important and how to size an u-trap for air ha...

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

Refrigerant Pipe Sizings

Refrigerant pipe sizingsSuction line velocity: 4.5m/s to max...

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

Smoke exhaust plug holing risks

Smoke exhaust design is not only about selecting a fan with ...

Coastal Corrosion of OA Dampers and Louv...

In a coastal environment, airborne salt settles on surfaces....

Passive House (Haus) Designs, Heat Recov...

The rise of Passive House design has fundamentally reshaped ...

Comparison of UVC, UVC LED and Far-UVC f...

For AHU cooling coil disinfection, conventional 254 nm UVC m...

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

How to Size U-Trap - AS/NZS 3666.1

Why is u-trap important and how to size an u-trap for air ha...

Chiller Power Consumption Calculation Us...

Use this chiller power consumption calculator to estimate ch...

Vibration calculator

Vibration CalculatorUse this vibration calculator to estimat...

AS 1668.2 2012 Car Park Exhaust Calculat...

Use this calculator to calculate the minimum exhaust airflow...

What consultants must learn from Lacross...

Disclaimer: The below is provided for general information an...

Why is my class room stale!

Those were the days my chief engineer checked all my designs...

NCC2025 Part J6D9 Pipework insulation

Updated to NCC 2025(1) Piping, vessels, heat exchangers and ...

Refrigerant R22

Before we get ahead of ourselves, R22 will phase out in Aust...

Indoor pool and wellness centre

Use this indoor pool and wellness centre calculator to estim...

What is Boiling

The first step to understanding how the air conditioning ref...

HVAC Duct Sizing Calculator

Use this calculator to calculate HVAC duct sizes using equal...

HVAC Sheet Metal Zinc Coating

Zinc coating selection is critical for HVAC sheet metal dura...

Refrigeration Cycles

As its name indicates, it’s in the evaporator that the...

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

Is the Dark Staining Around Ceiling Diff...

Dark smudging around a ceiling diffuser is often blamed on m...

AS 1668.2 bathroom and toilet exhaust ve...

Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

What do you want from your BMS 2/3

Before I answer the question, let’s look at the diagra...

Lesson learnt from Year 7 maths, when is...

Lesson learnt from Year 7 maths: when is 1 + 1 = 10?At first...

Low dT, pump control and why DP reset ma...

Low ΔT in a chilled water system is often misunderstoo...

Climate challenges ...

Climate change sits at the intersection of science, politics...

How Do Air Conditioners Work

The principal role of air conditioning is to maintain a comf...

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

Air and human comfort

Space explorations to the moon, other planets, and beyond ha...

What Happens in the Cold Heat Exchanger

Remember that R22 refrigerant vaporises at -42°C at atmo...

The Evaporation of R22

Let’s take a cylinder of R22 at an ambient temperature...

Chiller Power Consumption Calculation Us...

Use this chiller power consumption calculator to estimate ch...

Far Ultraviolet Germicidal Irradiation (...

Far-UVC Ultraviolet Germicidal Irradiation (UVGI)What do you...

Gas Detectors-Ammonia Refrigerant

The Refrigeration Gauges

Let’s examine the refrigeration pressure gauge: this i...

HVAC Sheet Metal Zinc Coating

Zinc coating selection is critical for HVAC sheet metal dura...

What is Refrigeration and Air Conditioni...

Are you looking to learn and take an air conditioning course...

How a chiller controls its capacity and ...

A chiller controls its capacity mainly by maintaining the le...

The Phenomenon of Condensation

We’ve seen that to vaporise R22, that is, to change it...

Carpark exhaust control

Laboratory Airflow Control Devices Air V...

Mould growth provisions for NCC 2022

Mould Growth Provisions for NCC 2022First published in Linke...

Outdoor-Air Intake Location and Indoor A...

Both AS 1668.2 and AS/NZS 3666.1 recognise that bringing out...

Condensate Tray Pondage Is an Installati...

Condensate trays must be graded to drain continuously and pr...

Maisotsenko Cycle

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

Natural Ventilation Requirements in Aust...

Natural ventilation is one of the simplest ways to provide o...

How to calculate room pressurisation

Use this room pressurisation calculator to estimate the airf...

Aged Care Homes Comfort Envelope

Comfort in aged care homes is not just about setting the the...

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

Indirect Evaporative Cooling-The Univers...

In 2011, we were tasked to resolve the HVAC system design fo...

What is Condenser in Air Conditioning Sy...

The air-cooled condenser is a heat exchanger. What is the fu...

Evaporative Condenser Access and Mainten...

Providing safety access platforms for evaporative condensers...

Heat energy and change of phase

Heat energy and change of phaseComfort air conditioning syst...

Passive House (Haus) Designs, Heat Recov...

The rise of Passive House design has fundamentally reshaped ...

Chiller System Designs Checklist

Before finalising the chiller selection, review the followin...

Water Cooled Chiller Sizing Calculator

Use this water-cooled chiller sizing calculator to estimate ...

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

How a chiller controls its capacity and ...

A chiller controls its capacity mainly by maintaining the le...

How Do Air Conditioners Work

The principal role of air conditioning is to maintain a comf...

UN SDGs, good intentions, wrong priority...

The United Nations Sustainable Development Goals (UN SDGs), ...

ASNZS 60079.10 Hazardous Area Ventilatio...

Use this to calculate hazardous atmosphere ventilation rate ...

Room Pressurisation Leakage and Fan Airf...

Use this calculator to estimate the airflow required to main...

Natural Ventilation Requirements in Aust...

Natural ventilation is one of the simplest ways to provide o...

Solar Air Conditioning

Solar energy has always been attractive to the building serv...

What is P, PI & PID controls

  An open loop system operates without feedback, i...

Understanding the Psychrometric Chart

Although engineers and technicians need to know how the valu...

Transfer Duct Sizing Calculator

Use this calculator to estimate the total pressure drop acro...

Cooling Tower Sizing Calculator

Use this cooling tower sizing calculator helps estimate prel...

Properties of air-psychrometry

Air is the medium with which buildings are cooled and heated...

Is the Dark Staining Around Ceiling Diff...

Dark smudging around a ceiling diffuser is often blamed on m...

Why Condenser Coil Fins Flaking and Fall...

When condenser fins become brittle, flake and fall apart whe...

The Role of the Compressor

Think back to the hot heat exchanger and the black grille be...

The Role of the Expansion Device (TXV an...

In the instance of a bicycle pump experiment, you will notic...

Air Cooled Chiller Sizing Calculator

Use this air cooled chiller sizing calculator to estimate co...

Chiller Sizing Calculator

Use this chiller sizing calculator to estimate key HVAC chil...

Deteriorated Busbar Insulation is a Seri...

The busbar insulation has deteriorated, exposing the live co...

Dehumidification load in swimming pool

Use this swimming pool dehumidification load calculator to e...

Relationship Between Pressure and Temper...

Relationship between Pressure and Temperature If you lo...

Preliminary Cooling Load Estimation

Use this preliminary cooling load estimator to calculate an ...

Carpark exhaust control

Refrigeration Cycles

As its name indicates, it’s in the evaporator that the...

Thermal Insulation R-Value and U-Value C...

Use this calculator to calculate R-value and U-value from in...

Legacy AHU Supply air fan speed control ...

Legacy Supply Air Fan Speed Control, A Smarter Way to Save E...

How to Size U-Trap - AS/NZS 3666.1

Why is u-trap important and how to size an u-trap for air ha...

AS 1668.2 bathroom and toilet exhaust ve...

Use this AS 1668.2 bathroom and toilet exhaust ventilation c...

Cost Saving Electronically Commutated (E...

One of the common reasons to adopt electronically commutated...

Chiller System Designs Mistakes

Chilled water systems can become inefficient, unstable or ex...

AS 1668.4 Natural Ventilation Opening Ar...

Use this calculator to estimate minimum natural ventilation ...

The Physiological Basis for Air Conditio...

Seasonal extremes of heat and cold are often outside the ran...

BCA Climate Zone Interactive Map

BCA Climate Zone Interactive MapUse the ACBC climate map to ...

Ground Source Heat Pump Size Estimator

Use this ground source heat pump size estimator to assess pr...

Design, construction and fit-out of food...

Practical Guide for Western Australian Food PremisesDesignin...

AS1668.2 2012 Appendix A Minimum OA

Use this AS 1668.2 outdoor air ventilation rate look up tool...

Calculate Fan Motor Power

Use this fan motor power calculator to estimate the power re...

Air Purifiers, Hepa Filters, or Air Filt...